Diaphragm-horn.



M. R. HUTGHISON.

DIAPHRAGM HORN.

APPLICATION FILED oGT. 26, 1909.

Patented Feb. 4, 1913.

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Specication of Letters Patent.

To all whom it may concern:

Be it known that I, MILLER REEsE I HUroHrsoN, a citizen of the United States,

and a resident of Summit, in the county'o Union and State of New Jersey, have 1nvented certain. new and useful Improvements in Diaphragm-Horns, of which the following is a specification.

My present invention relates to horns or signaling devices wherein a vibratory member such as a diaphragm is actuated by power derived from a rotary member or drive shaft, which may be the armature shaft of an elect-ric motor.

In my prior Patents Nos. 928,048, 923,049, and 923,122 I have disclosed various means through which movement of a rotary member may be applied to operate the diaphragm, as, for instance, a tension member, a thrust member, or a combined tension and thrust member, any of which may be either rigidly or pivotally mounted upon the diaphragm and may be tightly co-npled to the driving means, or may be loosely coupled so that only a part of the movement of the diaphragm is forced by the driving means, the diaphragm being permitted any desired degree of independent motion 1n either or both directions. The motion imparted to the diaphragm through such devices has been derived through cams, cranks, or other thrust surfaces eccenltrically arranged upon a member rotating about an axis approximately parallel to the diaphragm. As stated in said patents, the specific mechanisms shown and described therein are merely illustrative of a great variety of forms covered by but not specitically described in said patents, and my present invention includes novel driving means especially adapted for similar uses, but which may be employed in other relations where their functions or advantages may prove useful.

More specifically considered, my present invention involves an arrangement of parts whereby the vibratory mot-ions of the diaphragm may be derived from a drive shaft, such as the armature shaft of an electric motor, when such shaft is arranged at an angle to the plane of the diaphragm instead of parallel therewith. This 1s particularly desirable in the cases where the armature shaft of an electric motor is utilized as the drive shaft, since it permits a compact arrangement of the motor within a case which need not extend peripherally outside of the circumference required for inclosint'D the diaphragm. In certain cases the armature shaft may be perpendicular to the diaphragm, and if desired, may be arranged concentricall therewith so that its axis passes throug the center of the diaphragm. With the latter arrangement the 1motor case may be perfectly symmetrica..

My invention includes means whereby the rotary motion about an axis non-parallel with the diaphragm may bel applied for vibrating the latter, as, for instance, face cams, or face projections carried by the rotary member, and also a great variety of mechanical movements adapted to trans-` form rotary motion into reciprocating motion in a direction approximately parallel to the axis of the rot-ary motion.

4 Having thus described the nature of my invention, I will now describe certain practical embodiments thereof in connection with the accompanying drawings which show a vertical longitudinal section of the device.

In the drawings are shown the horn ,or resonator 1, front case 2, peripheral flange 3, diaphragm 4, clamps 5 and 6, and corklike gaskets 7 and 8 whichl may be of any known construction and are in fact similar to one of the forms shown in my prior application, Ser. No. 494,120, filed May 5, 1909. The wear piece 9, secured to the center of the diaphragm,`may be of any known or approved construction, but is preferably a flat steel plate brazed, welded or otherwise secured thereon.

The drive shaft 10 is the shaft of armature 13 energized through brushes 14 and Patented Feb. 4, 1913.

Application filed October 26, 1909. Serial No. 524,761.

commutator 15, rotating within the field of pole ieces 16 and 17 energized b coils 18, 19. he motor may be any suita le rotary motor, though for most purposes I prefer a low voltage direct current, shunt-wound motor adapted to rotate always in one direction, regardless of the polarity of the current supplied thereto.

While the cam described in my applica tion of even date herewith is an efficient means for transforming the rotary motion of the drive shaft into vibratory motion of a diaphragm at an angle thereto, by partly forced and partly free movements, I may employ any other desired mechanical movement for this purpose, preferably such as will permit arranging the drive shaft with its axis passing ithrough the center of the I' 59 hasthe advantage that the power is applied ;5 phragm. It results that lthe motion of the diaphragm, preferably perpendicular there to. In the arrangement shown, the motorbein i symmetrically arranged with. respect/f tot e .center of the diaphragm,V .the in` closing case is concentric therewith, and'. theentire ldevice is symmetrical w1th-re spect to a straight line passing throughtheaxis of the horn andfthe `v centerV of the dia-- phrag'mL v.

-The means for lapply-ing thefrotary motion of the armature shaft to the diaphragm consists ofl a vmember connectedv -thereto in' suoh'manner as tdbe.rotated'through land engagement wit-ha suitably supporte relatively, fixed member,

` at'thesa'me time'tofbe vfree for movement w 15 movement of 'such member. '1s utilizedy to parallel withthe axifsfth'ere'ofyThe ro-tary produce its longitudinal" .movement b ,c arn.

By reference-tothe drawings itlwill be vseenthat the'face cam 33 islav member mounted for rot-ary movement with the armature shaftA and is free for movement parallel with the axis by `reason of the spline 32. -The .stationary abutment or cam projection '34 is the' means for causing the rotary movement of. the cam to produce the longitudinal mnv'ement. The abutmentv 34 is carried by adjustable ,screw carrying 'an adjustable thumtrnut '36. In the 'form shown in. the Vdrawing a`spring'37 isinterposed vbetween the v'head of the projection 34 and the wall of ,thefcase's'o as to maintain the projection in a position as Afar for! ward as'the adjustment of the nut 36 will permit. 'Obviously the functions would be the same if the rotary Amember 33 had only a one projection fand the'stationary member was ajcircular face cam. The rec1procat-- ing rightline motion attainable by the above is utilized to vibrate the diaphragm. In the form shown --in thetlrafwings this is effected through the-medium of'a member 30 extendi f ing'entirely through the armature -shaft and provided adjacent thediaphragm with a sutable'diaphragm engaging portion 40. A

y hardened wearv piece or anvil 9 may be interposed` between the diaphragm and the dicular thereto'so' that there is no lateral member 40 if desired. This arrangement to` thediaphragm atthe center and perpencomponent yof the thrust and there can be noV reverse'bendmg effect upon the dialatter is a bodily movement adapted to proous omissions, substitutions, and' changes inthe proportions, sizes, and details of the-devicepand @fits operation, may be made ,without departing from my'invention. v

y A ,-Inga 'horn or signaling devicepa ,dia-`r phragmllincombination .with-a rotary shaft and'melns for vapplying the power of said shaft to agitate saidV diaphragm, said means includin a 'member rotated by said shaft ibut-r/g ee for]y longitudinal movement with respect 'thereto," ,andl coperating means whereby the v rotary movement of said last4 mentioned member causes the longitudinal movement thereof, 'the locationl and relative arrangement of the parts lbeing such that 'said longitudinal movement serves toA agitato the diaphragm. e

` 2.' In a horn or .signaling device,`a 'diai phragm in vcombinationwith a, rotary shaft and means for applying the power of said shaft to agit-ate diaphragm, said means including a memberV rotated by said shaft but free for longitudinal movement with respect thereto, and vmeans for causing such longitudinal movement and utilizing the latter lto agitate the diaphragm.

`3. In ahorn or lslgnaling device, a dia? phragm in combination witha rotary shaft and means forv applying the power of said l shaft to agitate said diaphragm, said means including a member rotated by said shaft but free for'llongitudinal movement with rel spect thereto, coperating means whereby the rotarymovement of said last mentioned member causes the longitudinal movement thereof, the locationand relative arrangement of the parts being such that said longitudinal movement serves to agitate the`diaphragm and said membera'nd coperating means being relatively adjustable in a direction longitudinal of said shaft.

' 4. In a horn or signaling device, a dia? phragm in combination with a rotaryshaft and means for applying the power of said shaft ,to agitate said diaphragm, said means including a member rotated by said shaft but free for longitudinal ,movement with respect thereto, coperating means whereby the rotary movement of said last mentioned member causes the longitudinal movement thereof, said longitudinal movementv being utilized to agita-te the diaphragm.

5. In a horn or signaling device, a diaphragm, in combination with a rotary driver y* l arranged with its axis approximately normal to said diaphragm, and means for applying the power of said rotary driver to agitate said diaphragm, said means including a member rotatably driven by said driver and arranged for to and fro movement with respect to the diaphragm, and coperating `relatively stationary means whereby the first mentioned movement imparted to said member by the driver causes the said movement 'with respect to the diaphragm.

6. In a horn or signaling device, a dialphragm, in combination with a rotary driver arranged with its'axis approximately normal to said diaphragm, and means for applying the power of said rotary driver to agitate said diaphragm, said means including a 'member rotatably driven by saidv driver and arranged for to and fro movement with respect to the diaphragm, and cooperating means including an inclined surface whereby the first mentioned movement imparted to said member by the driver causes the said movement with respect to the diaphragm.

7. In a horn or signaling device, a diaphragm, in combination with a rota motor arranged with its armature shaft approximately normal to said diaphragm, at its center and means for applying the power of said shaft to agitate said diaphragm, said means including a member rotatable with said shaft and arranged for to and fro movement with respect to theV diaphragm, and cooperating relatively stationary means whereby the first mentioned movement imparted to said member, causes the said movement with respect to the diaphragm.

8. In a horn or si aling device, a diaphragm, in combination with a rotar motor arranged with its armature sha t approximately normal to said diaphragm, and means for applying the power of said shaft to agitate said diaphragm, said meansl including a member rotated by said shaft and arranged for to and fro movement with respect to the diaphragm, and cooperating means including an inclined surface whereby the rst mentioned movement imparted to said member causes the said movement with respect to the diaphragm.

9.l In a horn or signaling device, a diaphragm, in combination with a rotary motor arranged with its armature shaft at an angle to said diaphragm, and means for applying the power of said shaft to agitate said diaphragm, .said means including a member rotatably driven by said shaft and arranged for movement toward-and away from the diaphragmand coperating means including a stationary cam whereby the circular movement of said member causes it to move toward the diaphragm, the construction and relative arrangement being such that the reaction from the diaphragm is in the direction of the return movement of said member. A

10. In a horn or signaling device, a diaphragm, in combination with arotary driver arranged with its axis approximately normal to said diaphragm, and means for applying the power of said driver to agitate said diaphragm, said means. including a member rotatably driven by 'said driving member and arranged for movement toward and away from the diaphragm, and co- `operating means including an inclined surface whereby the circular movement of said member causes it to move toward the diphragm, the construction .and relative arrangement being such that the reaction from the diaphragm is in the direction of the return movementof said member.

11. In a horn or signaling device, a diaphragm, in combination with a rotary electric motor arranged with its armature shaft approximately normal. to said diaphragm at its center, and means for applying the power of said shaft toagitate said diaphragm, said means including a member rotatably driven by said shaft and arranged for movement toward and away from the diaphragm, and cooperating means including an inclined surface whereby the circular movement of said member causes it to move toward the diaphragm, the construction and relative arrangementbeing such that reaction from the diaphragm is in the direction of the return movement of said member.

12. In a horn or signaling device, a diaphragm in combination with a rotary electric motor arranged with its armature shaft at an angle to the diaphragm, and means for applying the power of said shaft to agitate said diaphragm, said means including a thrust member carried by and secured for rotation with said shaft but free for longitudinal movement with respect thereto, cooperating means whereby the rotary movement of said shaft member causes longitudinal movement of said thrust member,

the location and relative arrangement of the lshaft but free for longitudinal movement with respect thereto, coperating means whereby the rotary movement of said shaft member causes the longitudinal movement of said thrust member, the location and relative arrangement ofthe parts being such that said longitudinal movement serves to agitate the diaphragm.

Signed at New York city, in the county and State of New York, this 25th* day of October, A. D., 1909.

MILLER Russa HUrcHIsoN. 

